applying bash42-028

diff --git a/patchlevel.h b/patchlevel.h
index 5e31cd4..a2be105 100644 (file)
--- a/patchlevel.h
+++ b/patchlevel.h
@@ -25,6 +25,6 @@
    regexp `^#define[   ]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 27
+#define PATCHLEVEL 28
 
 #endif /* _PATCHLEVEL_H_ */

diff --git a/subst.c b/subst.c
index b6476d8..fa4e5dc 100644 (file)
--- a/subst.c
+++ b/subst.c
@@ -5809,6 +5809,16 @@ parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat)
         is the only expansion that creates more than one word. */
       if (qdollaratp && ((hasdol && quoted) || l->next))
        *qdollaratp = 1;
+      /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is
+        a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the
+        flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the
+        expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
+        (which is more paranoia than anything else), we need to return the
+        quoted null string and set the flags to indicate it. */
+      if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL(temp) && QUOTED_NULL(l->word->word) && (l->word->flags & W_HASQUOTEDNULL))
+       {
+         w->flags |= W_HASQUOTEDNULL;
+       }
       dispose_words (l);
     }
   else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol)